Default Debugging USB in Android Flytouch 2.2.#2345

Hi Guys,
I am a newbee to your community and I would like to greet you all.
I am trying to root my Android Tablet 10.1 Flytouch Superpad v. 2.2.#2345 device to v. 4.2 and I cannot trace how to enable to the debugging USB mode.
I have tried almost all tricks like padding 7 times on the Build # etc but it is not possible.
Can someone please give me a helping hand to resolve this issue??
Thanks a lot.
PS.Is there another way to unlock the bootloader..??? My PC also cannot recognize the device..Deadlock !!